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vampirchik [111]
3 years ago
13

One staple weighs 31 milligrams. If a box of staples holds 250 staples, how many grams of staples does the box hold?

Mathematics
2 answers:
lilavasa [31]3 years ago
8 0

Answer:

7.75

Step-by-step explanation:

1 mg = 0.001 g

31 mg * 0.001 = 0.31 grams per staple

0.31 g * 250 = 7.75 grams per 250 staples

Nimfa-mama [501]3 years ago
3 0

Answer:

b) 7.75

Step-by-step explanation:

convert 31 milligrams to grams = .031 grams

250 x .031 = 7.75 grams

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Answer:

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Step-by-step explanation:

let the hourly rate of pay for Ben  = B

let the hourly rate of pay for Judy  = J

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Judy worked 2 hours and Ben worked 6 hours, their combined pay was $120

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Now, we should solve the expression;

   Multiply equation ii by 2 and equation i by 1;

 

            4J + B = 75 ----- i    x 1  ;    4J + B  = 75          -- iii

            2J + 6B  = 120 --- ii  x 2 ;   4J + 12B  = 240    ---iv

Now,

 equation iv - iii;

                   11B  = 165

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So, solving for J;

          4J + B = 75

         4J + 15  = 75

          4J  = 75 - 15  = 60

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Step-by-step explanation:

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3x+9y=75<br>8x+5y=67 <br>what is x and y?
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There are many ways to solve simultaneous linear equations. One of my favorite for finding integer solutions is graphing. The attached graph shows the solution to be ...

... (x, y) = (4, 7)

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You can also use Cramer's Rule, or the Vedic math variation of it, which tells you the solution to

ax+by=c\\dx+ey=f

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x=\dfrac{bf-ec}{\Delta}\\\\y=\dfrac{cd-fa}{\Delta}\qquad\text{where $\Delta=bd-ea$}

Here, that means

... x = (9·67-5·75)/(9·8-5·3) = 228/57 = 4

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